Loading...
Direct recognition of hepatocyte-expressed MHC class I alloantigens is required for tolerance induction.
Paul-Heng, Moumita Leong, Mario Cunningham, Eithne Bunker, Daniel L J Bremner, Katherine Wang, Zane Wang, Chuanmin Tay, Szun Szun McGuffog, Claire Logan, Grant J
Paul-Heng, Moumita
Leong, Mario
Cunningham, Eithne
Bunker, Daniel L J
Bremner, Katherine
Wang, Zane
Wang, Chuanmin
Tay, Szun Szun
McGuffog, Claire
Logan, Grant J
Citations
Altmetric:
Advisors
Editors
Other Contributors
Issue Date
2018-08-09
Submitted date
Files
Loading...
Open Access publication
Adobe PDF, 2.57 MB
Other Titles
Abstract
Adeno-associated viral vector–mediated (AAV-mediated) expression of allogeneic major histocompatibility complex class I (MHC class I) in recipient liver induces donor-specific tolerance in mouse skin transplant models in which a class I allele (H-2Kb or H-2Kd) is mismatched between donor and recipient. Tolerance can be induced in mice primed by prior rejection of a donor-strain skin graft, as well as in naive recipients. Allogeneic MHC class I may be recognized by recipient T cells as an intact molecule (direct recognition) or may be processed and presented as an allogeneic peptide in the context of self-MHC (indirect recognition). The relative contributions of direct and indirect allorecognition to tolerance induction in this setting are unknown. Using hepatocyte-specific AAV vectors encoding WT allogeneic MHC class I molecules, or class I molecules containing a point mutation (D227K) that impedes direct recognition of intact allogeneic MHC class I by CD8+ T cells without hampering the presentation of processed peptides derived from allogeneic MHC class I, we show here that tolerance induction depends upon recognition of intact MHC class I. Indirect recognition alone yielded a modest prolongation of subsequent skin graft survival, attributable to the generation of CD4+ Tregs, but it was not sufficient to induce tolerance.
Citation
JCI Insight. 2018 Aug 9;3(15). pii: 97500. doi: 10.1172/jci.insight.97500. eCollection 2018 Aug 9.
Publisher
Journal
PubMed ID
PubMed Central ID
Additional Links
Embedded video
Type
Article
Language
en
Description
Series/Report no.
ISSN
2379-3708
EISSN
ISBN
ISMN
Gov't Doc #
Sponsors
License
Attribution-NonCommercial-ShareAlike 4.0 International